1- No mention of Google suggests they are listing the Nexus7 under ASUS.
2- The Amazon curve is showing signs of seasonality.
3- Nook still getting lumped into others... That puts them under Lenovo with low 6-figure units shipped.

Nexus 7 under Asus? I thought it was made by Samsung. Or am I confusing it with the Galaxy Tab?

Either way, the chart also shows something else- the tablet company's sales and brand identity are linked. The exception is Samsung- possibly because of phone sales- beating Amazon. Asus' fourth place is understandable; it has brand identity because of everyone who remembers when the eeePC line.